Cross-shore Mysidacea (Crustacea) distribution in two sandy beaches with contrasting morphodynamics

Abstract

The order Mysidacea comprises small and very common crustaceans that inhabit most coastal ecosystem. The present contribution describes the composition, abundance and distribution of mysids in two sandy beaches representing the extreme conditions of the morphodynamics spectrum. Six species of mysids were found at the studied beaches. Metamysidopsis neritica Bond-Buckup & Tavares, 1992 was the most abundant species with more than 97% of the total individuals collected at the two beaches. At the dissipative beach was dominant in the swash and surf zone, with the greater abundance in the inner surf zone. At the reflective beach, this species was extremely abundant in the surf zone and backward the breaker. Bowmaniella brasiliensis Bacescu, 1968 occurred in low density at the surf zone of the dissipative beach, with the greater abundance in the outer surf zone, and it was practically absent in the nearshore zone. We suggest that mysids zonation in sandy beaches may be first developed as a response to food availability patterns imposed by the nearshore circulation systems, and in the second place as a result of competitive exclusion. The suggestion of partitioning of food and spatial resources shown by the mysid species is surprising in view of the apparent physical harshness and low spatial heterogeneity that seem to characterise the beach environment.

Ecomorphology and food habits of teleost fishes Trachinotus carolinus (Teleostei: Carangidae) and Menticirrhus littoralis (Teleostei: Sciaenidae), inhabiting the surf zone off Niterói, Rio de Janeiro, Brazil

“…Emerita spp.) and misids are very good and fast burrowers in the swash zone of sandy beaches (NEL et al, 1999;DUGAN et al 2000;BORZONE et al, 2007). This means that they can be found both in the water column and in the substrate.…”

Revision of mysids (Crustacea: Peracarida: Mysida) zoogeographical distribution in the south-west Atlantic (0° to 40°S)

“…distribution South-west Atlantic Brazil: Rio Grande do Norte, mouth of Potengy River (Bȃcescu, 1984); Bahia ; Rio de Janeiro, Mangaratiba Bay Bȃcescu, 1968a), and Sepetiba Bay (Bȃcescu, 1968a); São Paulo, Cananeia estuary (Almeida Prado, 1973Prado, , 1974Tararam et al, 1996; authors' own unpublished data); Paraná, Atami and Mansa beaches (Borzone et al, 2007); and Rio Grande do Sul, Lagoa dos Patos estuary (Gama, 2008).…”

“…Brasilomysis castroi Bȃcescu, 1968b: 81, figures 3-4;Brattegard, 1969: 61, figure 18;Almeida Prado, 1974: 50, figures 5 -7;Stuck et al, 1979a: 236, figures 2N, 3N, 4N, 5O;Price, 1982: 16, figures 13 -14;Escobar-Briones & Soto, 1989: 34, figure 5;Heard et al, 2006: 30, figure 24. distribution South-west Atlantic Brazil: Rio de Janeiro, Sepetiba Bay (Bȃcescu, 1968b); São Paulo, Ubatuba (Bȃcescu, 1968b), and Cananeia estuary (Almeida Prado, 1973Prado, , 1974Tararam et al, 1996; authors' own unpublished data); Paraná, Atami and Mansa beaches (Borzone et al, 2007).…”

“…Promysis atlantica Tattersall distribution South-west Atlantic Brazil: Ceará (Silva, 1979b); Espírito Santo, Vitória Bay (Sterza & Loureiro Fernandes, 2006); Rio de Janeiro, six miles off Rio de Janeiro Harbour (Tattersall, 1923), and Guanabara Bay ; São Paulo, Ubatuba (Bȃcescu, 1968c), Santos (authors' own unpublished data), and Cananeia estuary (Almeida Prado, 1973Prado, , 1974; Paraná, Atami Beach (Borzone et al, 2007); Santa Catarina (Resgalla, 2011); and Rio Grande do Sul, Tramandaí (Tavares & Bond-Buckup, 1990), and Lagoa dos Patos estuary (Gama, 2008). Uruguay: Río de la Plata estuary (authors' own unpublished data).…”

“…Later, studies by local and foreign scientists broadened the knowledge about regional mysid species richness with the description of new species from Brazilian (Bȃcescu, 1968a(Bȃcescu, , b, c, 1969(Bȃcescu, , 1984(Bȃcescu, , 1986Silva, 1970aSilva, , b, 1971aSilva, , b, 1972Silva, , 1974Silva, , 1979aReis & Silva, 1987; and Argentine waters (Hoffmeyer, 1993;Carcedo et al, 2013). To date, a limited amount of investigations concerning their biology (Loureiro Fernandes & Gama, 1996;Rörig et al, 1997;Gama & Zamboni, 1999;Gama et al, 2002Gama et al, , 2006Gama et al, , 2011, distribution and/or population structure Almeida Prado, 1973González, 1974;Silva, 1979b;Hoffmeyer, 1990;Tavares & Bond-Buckup, 1990; Tararam et al, 1996;Bond-Buckup & Tavares, 1998;Fries, 1999;Calliari et al, 2001Calliari et al, , 2007Schiariti et al, 2004Schiariti et al, , 2006Viñas et al, 2005;Cardelli et al, 2006;Borzone et al, 2007;Gama et al, 2007;Calil & Borzone, 2008;Gama, 2008) have been completed in the south-west Atlantic. In the late 1990s, Murano (1999) performed the most comprehensive review available to date of the mysidacean fauna (orders Mysida and Lophogastrida) of the South Atlantic Ocean, considering marine coastal and deep waters, including geographical and vertical distribution, detailed descriptions and illust...…”